package com.service.abolishing.config;

import org.springframework.amqp.core.Binding;
import org.springframework.amqp.core.BindingBuilder;
import org.springframework.amqp.core.Queue;
import org.springframework.amqp.core.TopicExchange;
import org.springframework.amqp.rabbit.annotation.RabbitListenerConfigurer;
import org.springframework.amqp.rabbit.connection.ConnectionFactory;
import org.springframework.amqp.rabbit.core.RabbitTemplate;
import org.springframework.amqp.rabbit.listener.RabbitListenerEndpointRegistrar;
import org.springframework.amqp.support.converter.Jackson2JsonMessageConverter;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.messaging.converter.MappingJackson2MessageConverter;
import org.springframework.messaging.handler.annotation.support.DefaultMessageHandlerMethodFactory;
import org.springframework.messaging.handler.annotation.support.MessageHandlerMethodFactory;

/**
 * @ClassName: RabbitConfig
 * @Description:
 * @Author guochuang
 * @Date 2021/10/25
 * @Version 1.0
 */

    /**
     Broker:它提供一种传输服务,它的角色就是维护一条从生产者到消费者的路线，保证数据能按照指定的方式进行传输,
     Exchange：消息交换机,它指定消息按什么规则,路由到哪个队列。
     Queue:消息的载体,每个消息都会被投到一个或多个队列。
     Binding:绑定，它的作用就是把exchange和queue按照路由规则绑定起来.
     Routing Key:路由关键字,exchange根据这个关键字进行消息投递。
     vhost:虚拟主机,一个broker里可以有多个vhost，用作不同用户的权限分离。
     Producer:消息生产者,就是投递消息的程序.
     Consumer:消息消费者,就是接受消息的程序.
     Channel:消息通道,在客户端的每个连接里,可建立多个channel.
     */
@Configuration
public class RabbitConfig implements RabbitListenerConfigurer {
    //交换
    public static final String EXCHANGE_A = "my-mq-exchange_A";
    public static final String EXCHANGE_B = "my-mq-exchange_B";
    public static final String EXCHANGE_C = "my-mq-exchange_C";

    //队列
    public static final String QUEUE_A = "QUEUE_A";
    public static final String QUEUE_B = "QUEUE_B";
    public static final String QUEUE_C = "QUEUE_C";
    public static final String QUEUE_D = "QUEUE_D";
    //路由key
    public static final String ROUTING_KEY_A = "test.spring-boot-routingKey_A";
    public static final String ROUTING_KEY_B = "test.spring-boot-routingKey_B";
    public static final String ROUTING_KEY_C = "test.spring-boot-routingKey_C";
    //public static final String ROUTING_KEY_D = "test.spring-boot-routingKey_D";

    @Bean
    public RabbitTemplate rabbitTemplate(final ConnectionFactory connectionFactory) {
        final RabbitTemplate rabbitTemplate = new RabbitTemplate(connectionFactory);
        rabbitTemplate.setMessageConverter(producerJackson2MessageConverter());
        return rabbitTemplate;
    }

    @Bean
    public Jackson2JsonMessageConverter producerJackson2MessageConverter() {
        return new Jackson2JsonMessageConverter();
    }

    @Override
    public void configureRabbitListeners(RabbitListenerEndpointRegistrar rabbitListenerEndpointRegistrar) {
        rabbitListenerEndpointRegistrar.setMessageHandlerMethodFactory(messageHandlerMethodFactory());
    }
    @Bean
    MessageHandlerMethodFactory messageHandlerMethodFactory() {
        DefaultMessageHandlerMethodFactory messageHandlerMethodFactory = new DefaultMessageHandlerMethodFactory();
        messageHandlerMethodFactory.setMessageConverter(consumerJackson2MessageConverter());
        return messageHandlerMethodFactory;
    }

    @Bean
    public MappingJackson2MessageConverter consumerJackson2MessageConverter() {
        return new MappingJackson2MessageConverter();
    }
    /**
     * 针对消费者配置
     * 1. 设置交换机类型
     * 2. 将队列绑定到交换机
     FanoutExchange: 将消息分发到所有的绑定队列，无routingkey的概念
     HeadersExchange ：通过添加属性key-value匹配
     DirectExchange:按照routingkey分发到指定队列
     TopicExchange:多关键字匹配
     */
    @Bean
    public TopicExchange topicExchange() {
        return new TopicExchange(EXCHANGE_A,true,false);
    }
    /**
     * 获取队列A
     * @return
     */
    @Bean
    public Queue queueA() {
        return new Queue(QUEUE_A, true); //队列持久
    }
    //    /**
//     * 获取队列B
//     * @return
//     */
    @Bean
    public Queue queueB() {
        return new Queue(QUEUE_B, true); //队列持久
    }
    @Bean
    public Queue queueC() {
        return new Queue(QUEUE_C, true); //队列持久
    }
//    @Bean
//    public Queue queueD() {
//        return new Queue(QUEUE_D, true); //队列持久
//    }

    //交换机可以绑定多个消息队列，可以分发到不同的队列当中去
    @Bean
    public Binding binding() {
        return BindingBuilder.bind(queueA()).to(topicExchange()).with(ROUTING_KEY_A);
    }
    @Bean
    public Binding bindingB() {
        return BindingBuilder.bind(queueB()).to(topicExchange()).with(ROUTING_KEY_B);
    }
    @Bean
    public Binding bindingC() {
        return BindingBuilder.bind(queueC()).to(topicExchange()).with(ROUTING_KEY_C);
    }
//    @Bean
//    public Binding bindingD() {
//        return BindingBuilder.bind(queueC()).to(topicExchange()).with(ROUTING_KEY_D);
//    }
}
